Simulation of soil water dynamics in layered soils
1977
Hillel, D. | Talpaz, H.
A numerical model of soil water dynamics was devised to simulate infiltration, drainage, evaporation, and water storage in texturally layered profiles. the layers consisted of sandlike, loamlike, and claylike soil of known hydraulic properties. data presented on the flow patterns of the variously stratified profiles illustrate the interactions between soil and weather variables which govern profile water storage. fine textured layers tend to impede infiltration but may in the long run promote drainage of overlaying layers. toplayers of coarse texture tend to inhibit evaporation. since the relative hydraulic conductivities of layers of different textures vary as soil moisture suction changes in time, it seems extremely difficult to predict the dynamic behavior of composite profiles without the benefit of a comprehensive simulation model. shortcomings of the present model are pointed out, however.
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